Show put it into the erh earth the united states stales with about 0 per cent of the worlds population uses approximately 19 per cent of the worlds annual output of commercial fertilizer and ranks second only to germany as a producer the worlds annual production Is worth on assumed values of ago a ton for nitrogen to lo the warehouses of the producer and a value of 30 50 a ton each for phosphoric acid and potash the total amount of plant food used by amerlean american farmers increased 45 per cent from 1911 to 1928 |